Daily Archives: 2019-04-10

Astronomy News

Event Horizon Telescope releases first-ever black hole image

From Astronomy Magazine

http://www.astronomy.com/

Event Horizon Telescope releases first-ever black hole image

After decades of theorizing about the possibility of catching a black hole image, astronomers have finally pulled it off. The results offer new insights into the mysterious objects.

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By Korey Haynes  |  Published: Wednesday, April 10, 2019
AConsensus
The first ever image of a black hole shows the supermassive black hole in the heart of galaxy M87
On Wednesday, astronomers revealed the first image ever taken of a black hole, bringing a dramatic conclusion to a decades-long effort. The iconic image offers humanity its first glimpse at the gas and debris that swirl around its event horizon, the point beyond which material disappears forever. A favorite object of science fiction has finally been made real on screen.
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The nature of M87: EHT’s look at a supermassive black hole

By directly imaging M87’s supermassive black hole and accretion disk, researchers are already learning more about the complex processes that shape the jets of active galaxies.

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Why the Event Horizon Telescope took so long to image a black hole

Scientists have finally imaged the invisible. Why did it take two decades to snap a shot of a black hole?

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How the Event Horizon Telescope imaged an invisible black hole

How scientists imaged a black hole is nearly as impressive as the picture itself.

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Astronomy News

A couple of articles involving Canadians on the ISS

A couple of articles involving Canadians on the ISS appeared in the Montreal Gazette:

  • Chris Hadfield’s famous photos from the International Space Station will soon be available to the public
  • Saint-Jacques walks in space

Chris Hadfield’s famous photos to be made public  

Montreal Gazette,

Astronaut Chris Hadfield’s famous photos from the International Space Station will soon be available to the public. Hadfield donated more than 13,000 photos to Dalhousie University in Halifax, where they will be preserved and available for educational and research purposes. Marlo MacKay of the Dalhousie Libraries says they will be available as of Thursday, when the university will hold a public launch. Hadfield took 45,000 photographs during a five-month mission commanding the ISS that ended in May 2013.

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‘A GLIMPSE OF THE FUTURE’

Saint-Jacques walks in space

  • Montreal Gazette,
  • SIDHARTHA BANERJEE

CANADIAN SPACE AGENCY/NASAAstronaut David Saint-Jacques tackled a 61/2-hour-long to-do list alongside NASA’s Anne McClain during Monday’s spacewalk at the International Space Station. Saint-Jacques is the first Canadian to perform a spacewalk since 2007.

LONGUEUIL, QUE.  Astronaut David Saint-Jacques became just the fourth Canadian to complete a spacewalk Monday, accomplishing several tasks alongside NASA astronaut Anne McClain in about six-and-a-half hours before returning inside the International Space Station.

Saint-Jacques, 49, is the first Canadian to perform a spacewalk since 2007.

After re-entering the space station, he hailed the mission as “a glimpse of the future as we venture further into space.” He said the international effort was an excellent example of collaboration.

“Because when we manage to look beyond our differences, we achieve things that seem impossible,” Saint-Jacques said. “That’s how we progress.”

McClain, who was performing her second spacewalk, thanked the ground team. “We know that it’s a lot of hard work, and a lot of big sighs of relief as soon as the hatch did get closed,” she said.

The spacewalk appeared to run like clockwork, with Saint-Jacques and McClain actually leaving the space station half-an-hour earlier than scheduled.

Retired astronaut Dave Williams said astronauts prefer to have a cushion against the unpredictability of working in space. “We like to get ahead on the timeline and stay ahead, because you never know what’s going to happen during a spacewalk,” Williams said at the Canadian Space Agency headquarters in suburban Montreal.

Williams holds the Canadian record for the most spacewalks, with three for a total of just under 18 hours outside the space station during a 2007 mission. Those came at a time when there was extensive building going on at the station.

Now, astronauts are transitioning mostly to maintenance tasks, which partly explains the long gap since the last Canadian spacewalk by Williams. The other two Canadian astronauts to have performed the feat are Steve MacLean in 2006 and Chris Hadfield in 2001.

Saint-Jacques is on his first posting to the space station, which began on Dec. 3. After emerging from the station, the Canadian performed a few brief movements to get used to his suit before diving into the to-do list, which took 6 hours, 29 minutes.

The tasks took the pair all over the station and included relocating a battery adapter plate, upgrading the station’s wireless communication system and connecting jumper cables along the midpoint of the station’s main truss to give Canadarm2 an alternative power source.

Saint-Jacques, McClain and Oleg Kononenko of the Russian space agency, Roscosmos are scheduled to return to Earth in June.